class Node extends Object {
  constructor(params) {
    super()
    this.id = params.id

    for (let key in params) {
      this[key] = params[key] || 0
    }
    this.size = params.size.split('*')
    this.parent = params.parent // 所属组
    this.index = params.index // 渲染层级
  }
}
export default Node
